Creative ideas needed - head tube badge

I'm bored at work and looking to do a new head tube badge for my Intense 6.6
I'm going to machine one from aluminium using our MasterCAM software and have just found that I can import images and convert them into machine code so this opens up a lot of options.
So anyone got any good ideas of what would make a good badge? The higher quality the image the better and black on white is also ideal.